You can't be a member of two workgroups only one.You can access other workgroup computers if you have an account on them and resources shared to your account.

You should not need a second nic card since the router between you and the other subnet should handle that traffic. You do need that router to be in infrastructure mode not gateway mode if that model supports it.

You will continue to have major issues in the near future if you don't 1. go to a server/client model instead of peer to peer2. correct your topology. You have FOUR switches between you and the internet [each router is also a switch]

I'm not sure about the infrastructure but previously there is a MIS guy who made some setting and enable access to two workgroups. I remember the other person said that it has something to do with bridge connection.

Actually this one pc only that has 2 nic card that wants to access two different workgroup.

We are using a Tree Topology. No improvements.

Its just that i need to know whether it is possible or not to make a bridge connection that can access 2 different workgroup?

I've tried setting the bridge connection with the following IP:1) IP : 20.25.80.55 Default gateway: 20.25.80.12) IP : 20.25.100.55 Default gateway: 20.25.100.1either IPs regardless of the workgroup name, it only can access one workgroup and the other can only see itself only.

take the gateways off and try againyou don't bridge. Bridging is to connect the two networks which makes no sense.If you had the proper router or topology you would not need the two nics. This will create network loops and security compromizes in the long run.

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